Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a velocidade para Chris Swallow?
 ###Tabelas: CREATE TABLE winning_head_of_the_river_championship_events (winning_head_of_the_river_championship_events_id AUTO_INCREMENT PRIMARY KEY, Crew INT, Open 1st VIII VARCHAR, Open 2nd VIII VARCHAR, Open 3rd VIII VARCHAR, U16 1st VIII VARCHAR, U16 2nd VIII VARCHAR, U16 3rd VIII VARCHAR, U15 1st Quad VARCHAR, U15 2nd Quad VARCHAR, U15 3rd Quad VARCHAR, U15 4th Quad VARCHAR, U15 5th Quad VARCHAR, U15 6th Quad VARCHAR) CREATE TABLE doubles:_19_12_titles_7_runners-up (doubles:_19_12_titles_7_runners-up_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE race_2;_senior_classic_race (race_2;_senior_classic_race_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Rider VARCHAR, Team VARCHAR, Speed VARCHAR, Time VARCHAR) CREATE TABLE music_videos (music_videos_id AUTO_INCREMENT PRIMARY KEY, Year INT, Music video VARCHAR, Length VARCHAR, Album VARCHAR, Official MV on YouTube VARCHAR) CREATE TABLE number_of_participants (number_of_participants_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Premier INT, First INT, Second INT, Total INT)  
SELECT Speed FROM race_2;_senior_classic_race WHERE Rider = chris swallow